What is the best evidence is there that the 15 species of finch all evolved from one common ancestor?
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1 point
Observation of all 15 species shows that they look incredibly similar, with minor changes to beak size and shape.
Scientists have been studying them since Darwin in 1835 and have watched them evolve.
These 15 species are found nowhere else in the world, and the islands are located close enough to the mainland for birds to migrate.
DNA analysis shows that their DNA is almost identical with only minor changes.
1 answer
The best evidence is likely the DNA analysis, which shows that their DNA is almost identical with only minor changes. This suggests a common ancestor from which they all evolved.